Income Taxes - Sources of Temporary Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax liabilities:
Fixed assets	$ (32,551)	$ (30,499)
Operating and Finance lease right-of-use assets	(6,610)	(6,016)
Other	(48)	(61)
State deferred taxes	(3,607)	(3,842)
Total deferred tax liabilities	(42,816)	(40,418)
Deferred tax assets:
Captive insurance subsidiary	335	396
Accrued liabilities	2,541	2,383
Stock compensation	3,467	3,076
Operating and Finance lease liabilities	8,418	7,936
Other	48	916
State deferred taxes	5,232	6,548
Total deferred tax assets	20,041	21,255
Valuation allowance	(1,148)	(2,241)
Net deferred income tax liabilities	$ (23,923)	$ (21,404)